Re: Two devicetree questions and two use cases

The board is here. For some reason both my old Fedora installation and
SystemRescue failed to boot on it so I can't run autoport yet.

However, I did change that PCIe bandwidth setting and took a SPI flash dump
before and after. That PCH soft strap DID change.

Where do we go from here?

Thanks
Keith

On Thu, Jan 9, 2025, 22:24 Nicholas Chin <[email protected]> wrote:

> > Hi Keith,
> >
> >> Hi Nicholas,
> >>
> >> Thanks for the reply, and the scoop, and pardon my second email to the
> >> list that essentially asked the same question again.
> >>
> >> The hidden register would be a boon to my goals. I have an Asus P8Z77-
> >> V LE Plus board on order that I will soon be able to test the idea on,
> >> since it is one of those boards with more devices than PCIe lanes. It
> >> is part of my plan to bring coreboot to all the P8x7x boards. Towards
> >> that goal there are a few patches I'm looking to get in such as
> >> CB:82556,82557,85834, and am still looking for volunteers to boot test
> >> my as yet incomplete ports.
> >>
> >> Cheers
> >> Keith
>
> Oh, I was going to add: When you get your P8Z77-V LE Plus, I guess it
> would be a good idea to set the different options for that "PCI Express
> X16_3 Slot (Black) bandwidth" option in the vendor firmware setup menu
> and then dump the IFD to see if it's actually changing any soft straps.
> It would also be good to collect register dumps from tools like
> inteltool (especially the RCBA registers) and lspci to see if there's
> anything else that's changing.
>
>
>

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